How will an AI comprehend the ethics of "right" and "wrong"?
Right and wrong only exist relative to some goal or purpose.

To make a machine do more right than wrong, relative to human goals, one should minimize the surface area of the machine's purpose. Doing that minimizes the intrinsic behavior of the AI, which enables us to reason about the right and wrong behaviors of the AI, relative to human purposes.

Horses are quite general over the domains of their purposes, but are still predictable enough for humans to control and benefit from. As such, we will be able to produce machines (conscious or unconscious) that are highly general over particular domains, while still being predictable enough to be useful to humans.

The most efficient machines for most tasks, though, will not need consciousness, nor even the needs that cause survivalistic, adversarial and self-preserving behaviors in eukaryotic cells. Because most of our solutions won't need those purposes to optimize over our problems, we can allow them to be much more predictable.

We will be able to create predictable, efficient AIs over large domains that are able to produce predictable, efficient AIs over more specific domains. We'll be able to reason about the behavioral guarantees and failure modes of those narrow domains.

In the event that we one day desire to build something as unpredictable as a human, like we do when having babies, then we'll probably do that with the similar intentions and care that we use to bring an actual baby into the world. There is simply no purpose in creating a thing more unpredictable than you unless you're gambling on this thing succeeding you in capability - which sounds exactly like having babies.

After that, the best we can do is give it our theories about why we think we should act one way or another.

Now, theoretically, some extremely powerful AI could potentially construct a human-like simulacrum that, in many common situations, seems to act like a human, but that in fact has had all of it's behaviors formally specified a priori, via some developmental simulation, such that we know for a fact that all such behaviors produce no intentional malice or harm. However, if we can formally specify all such behaviors, we wouldn't be using this thing to solve any novel problems, like curing cancer, as the formal specification for curing cancer would already have been pre-computed. If you can formally specify the behaviors of a thing that can discover something new, you can just compute the solution via the specification, without instantiating the behaviors at all!

Once AI has reached a certain level of capability, it won't need to generate consciousnesses to derive optimal solutions. And at that point, the only purpose for an artificial human to exist will be, like us, for its own sake.